A method of determining horizontal structure of the ionosphere from backscatter ionograms

Details A method of determining horizontal structure of the ionosphere from backscatter ionograms A method of determining horizontal structure of the ionosphere from backscatter ionograms

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jatp...56..115f&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 56, no. 1, p. 115-131

Computer Science

Sound

4

Algorithms, Backscattering, Earth Ionosphere, Electron Density (Concentration), Horizontal Distribution, Ionograms, Plasma Diagnostics, Atmospheric Sounding, Earth Surface, Inversions, Mathematical Models, Obliqueness, Radio Transmission, Vertical Distribution, Wave Propagation

Scientific paper

We have developed a technique for oblique backscatter sounding (OBS) ionogram inversion as a diagnostic tool for the horizontally inhomogeneous structure of the ionosphere. Input data for the method include the leading edge of a backscatter ionogram that is measured through soundings in a given direction, and the vertical electron density profile measured over the sounding station or over some other site lying in the sounding direction. The method may be useful for reconstructing the two-dimensional electron density distribution in a vertical plane aligned with the direction of sounding. The inverse problem has been solved using the Newton-Kontorovich method and the Tikhonov regularization method. The algorithm we have developed was tested against model data, that is, OBS ionograms synthesized using geometrical optics calculations for different models of the inhomogeneous ionosphere. Test results demonstrate that our method converges reliably, is stable to measurement errors and provides a good accuracy of reconstruction of inhomogeneous structures with scales of 100-2000 km. This indicates that this method shows promise as an operative remote diagnostic tool for ionospheric irregularities of natural and artificial origin.

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